[MacPorts] #56209: qt5: incompatible Qt library version

[MacPorts]

#56209: qt5: incompatible Qt library version
--------------------+--------------------
 Reporter:  mojca   |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  qt5
--------------------+--------------------
 While trying to upgrade `xpdf`, the port built fine, but it failed to run:
 {{{
 Cannot mix incompatible Qt library (version 0x50a00) with this library
 (version 0x50a01)
 Abort trap: 6
 }}}

 I have no clue what this means, but I suspect that one of the libraries
 was not revbumped when Qt was updated.

 I'm using 10.13. I'll put a slightly longer log in comment.

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Ticket URL: <https://trac.macports.org/ticket/56209>
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